1. This tutorial demonstrates how to perform buckling analyses in ANSYS using both the eigenvalue and nonlinear methods. The eigenvalue method predicts theoretical buckling strength but does not account for imperfections, while the nonlinear method is more accurate.
2. For the eigenvalue analysis, a beam is modeled and constrained at one end with a unit load applied at the other. Solving yields a critical buckling load of 41,123 N.
3. For the nonlinear analysis, large deflection is considered and the load is gradually increased until buckling occurs around 40,000 N, slightly lower than the eigenvalue solution as expected.
The document provides an overview of buckling analysis in ANSYS. It discusses buckling of columns with well-defined end conditions, buckling of a special column, and second order analysis of a simple beam. The preprocessing, solution, and postprocessing phases of ANSYS are outlined. Step-by-step instructions are given for modeling each example and obtaining the buckling load using eigenvalue buckling analysis. Manual calculations are also shown for comparison.
This document provides details on using ANSYS Workbench to analyze the stresses and displacement in a steel plate with a circular hole. It begins with the problem specifications, then reviews the analytical solutions for displacement, stresses (radial, circumferential, and shear) in an infinite plate with a hole. It outlines setting up the model in ANSYS Workbench, including defining the material properties, sketching the quarter plate geometry, applying dimensions, generating the surface, and preparing to mesh the model. The summaries provided analytical expectations for the various stress and displacement values to later compare with the numerical ANSYS results.
This document provides an overview of ANSYS Workbench software for structural and thermal analysis. It describes the user interface, types of analysis available including linear static, modal, heat transfer and buckling. It outlines the steps to set up a static structural analysis including importing geometry, applying materials, meshing, boundary conditions and solving. License types are also summarized. The goal is to teach the basics of using simulation capabilities in ANSYS Workbench.
CONCEPT OF FINITE ELEMENT MODELLING FOR TRUSSES AND BEAMS USING ABAQUSIAEME Publication
Abaqus is one of the powerful engineering software programs which are based on the finite element method. The Abaqus can solve wide range of pr oblems from linear to nonlinear analyses. Abaqus is widely used in many sectors like automotive and mechanical industries for design and development of FEM products. The finite element method is a numerical technique for finding approximate solutions for d ifferential and integral equations. The finite element word was coined by Clough in 1960. In 1960s, engineers used the method for solving the problems in stress analysis, strain analysis, heat and fluid transfer, and other region. Abaqus CAE can provide a simple creating model, submitting the modal, monitoring, and evaluating result and then can also compare with theoretical calculation.
Finite Element Analysis (FEA) is a numerical method for solving complex engineering problems. The document discusses conducting FEA on a fixed-free cantilever beam to study the effect of mesh density on solution accuracy. Analytical solutions are derived and used to validate FEA results. A beam model is created in ABAQUS with varying element sizes. As element count increases, FEA results converge towards analytical solutions, though with increased computation time. An element count of 4125 provided an optimal balance between accuracy and cost.
Expressions for shape functions of linear element Sharath Kumar
Here in this presentation we will be knowing about Expressions for shape functions of linear element, their co-ordinates, differential equations, strain displacement relations, properties of stiffness matrix, applications.
This document provides a question bank for the Finite Element Analysis course ME6603 taught at R.M.K College of Engineering and Technology. It contains 180 questions divided into two parts - Part A (short questions) and Part B (long questions). The questions cover the main topics of the course including the basic concepts and procedure of finite element analysis, discretization, element types, weighted residual methods, potential energy approach, and boundary conditions. Commercial FEA software packages and steps to use them are also discussed. The document aims to help students prepare for exams by providing a variety of questions related to the finite element method and its applications in engineering problems.
The document provides an overview of buckling analysis in ANSYS. It discusses buckling of columns with well-defined end conditions, buckling of a special column, and second order analysis of a simple beam. The preprocessing, solution, and postprocessing phases of ANSYS are outlined. Step-by-step instructions are given for modeling each example and obtaining the buckling load using eigenvalue buckling analysis. Manual calculations are also shown for comparison.
This document provides details on using ANSYS Workbench to analyze the stresses and displacement in a steel plate with a circular hole. It begins with the problem specifications, then reviews the analytical solutions for displacement, stresses (radial, circumferential, and shear) in an infinite plate with a hole. It outlines setting up the model in ANSYS Workbench, including defining the material properties, sketching the quarter plate geometry, applying dimensions, generating the surface, and preparing to mesh the model. The summaries provided analytical expectations for the various stress and displacement values to later compare with the numerical ANSYS results.
This document provides an overview of ANSYS Workbench software for structural and thermal analysis. It describes the user interface, types of analysis available including linear static, modal, heat transfer and buckling. It outlines the steps to set up a static structural analysis including importing geometry, applying materials, meshing, boundary conditions and solving. License types are also summarized. The goal is to teach the basics of using simulation capabilities in ANSYS Workbench.
CONCEPT OF FINITE ELEMENT MODELLING FOR TRUSSES AND BEAMS USING ABAQUSIAEME Publication
Abaqus is one of the powerful engineering software programs which are based on the finite element method. The Abaqus can solve wide range of pr oblems from linear to nonlinear analyses. Abaqus is widely used in many sectors like automotive and mechanical industries for design and development of FEM products. The finite element method is a numerical technique for finding approximate solutions for d ifferential and integral equations. The finite element word was coined by Clough in 1960. In 1960s, engineers used the method for solving the problems in stress analysis, strain analysis, heat and fluid transfer, and other region. Abaqus CAE can provide a simple creating model, submitting the modal, monitoring, and evaluating result and then can also compare with theoretical calculation.
Finite Element Analysis (FEA) is a numerical method for solving complex engineering problems. The document discusses conducting FEA on a fixed-free cantilever beam to study the effect of mesh density on solution accuracy. Analytical solutions are derived and used to validate FEA results. A beam model is created in ABAQUS with varying element sizes. As element count increases, FEA results converge towards analytical solutions, though with increased computation time. An element count of 4125 provided an optimal balance between accuracy and cost.
Expressions for shape functions of linear element Sharath Kumar
Here in this presentation we will be knowing about Expressions for shape functions of linear element, their co-ordinates, differential equations, strain displacement relations, properties of stiffness matrix, applications.
This document provides a question bank for the Finite Element Analysis course ME6603 taught at R.M.K College of Engineering and Technology. It contains 180 questions divided into two parts - Part A (short questions) and Part B (long questions). The questions cover the main topics of the course including the basic concepts and procedure of finite element analysis, discretization, element types, weighted residual methods, potential energy approach, and boundary conditions. Commercial FEA software packages and steps to use them are also discussed. The document aims to help students prepare for exams by providing a variety of questions related to the finite element method and its applications in engineering problems.
The document discusses stress concentration and fatigue failure in machine elements. It defines stress concentration as irregular stress distribution caused by abrupt changes in cross-section shape. Stress concentration factors are introduced to quantify the maximum stress compared to nominal stress. The document also discusses endurance limit and fatigue strength testing methods. Factors that affect fatigue strength like material properties, surface finish, size and temperature are summarized. Methods to evaluate and reduce stress concentration in designs are provided.
Analysis of buckling behaviour of functionally graded platesByju Vijayan
1. The document discusses the buckling behavior of functionally graded plates through two case studies.
2. The first case study analyzes the buckling of simply supported functionally graded rectangular plates under non-uniform in-plane compressive loading using classical plate theory. It finds that the critical buckling coefficient increases with the power law index and aspect ratio.
3. The second case study examines the buckling of imperfect functionally graded plates under in-plane compressive loading. It determines that the critical buckling load depends on factors like the load ratio, power law index, and amplitude of imperfection.
This document summarizes different types of surfaces that are important from a CAD/CAM perspective. It discusses analytic surfaces like planes, ruled surfaces, tabulated surfaces, and surfaces of revolution which are defined by equations. It also discusses synthetic surfaces like Hermite bi-cubic surfaces, Bezier surfaces, B-spline surfaces, Coons surfaces, fillet surfaces, and offset surfaces which are defined by a set of data points and approximated with polynomials. The document provides examples and definitions of each surface type.
Finite Element analysis -Plate ,shell skew plate S.DHARANI KUMAR
This document provides an overview of plate and shell theory and finite element analysis for plates and shells. It discusses the assumptions and applications of thin plate theory, thick plate theory, and shell theory. It also describes different types of finite elements that can be used to model plates and shells, including plate, shell, solid shell, curved shell, and degenerated shell elements. Additionally, it covers skew plates and different discretization methods that can be used for finite element analysis of skew plates.
*Discretization of a Structure, 1D, 2D and 3D element Meshing, * Element selection criteria, *Refining Mesh,
*Effect of mesh density in critical region,
*Use of Symmetry.
*Element Quality Criterion:-Jacobian, Aspect ratio, Warpage, Minimum and Maximum angles, Average element size, Minimum Length, skewness, Tetra Collapse etc., *Higher Order Element vs Mesh Refinement,
*Geometry Associate Mesh, *Mesh quality,
*Bolted and welded joints representation,
*Mesh independent test.
- The document provides instructions for using CATIA's Sheet Metal Design workbench to design sheet metal parts.
- It begins with an overview and getting started tutorial, then covers topics like defining sheet metal parameters, creating walls and cutouts, generating bends, unfolding the part, and extracting drawings.
- The document also provides information on recognizing shapes from existing solid parts, generating bends from walls, adding additional sheet metal features, and designing sheet metal parts within an assembly context.
The document discusses contact stresses that occur between two surfaces pressed together, such as between a locomotive wheel and rail. It provides examples where contact stresses are significant, like in bearings and gears. When surfaces are pressed together, high stresses develop just below the surface at the point of contact. These stresses can cause failures like cracking or pitting. The document presents equations to calculate the principal stresses that develop from an elliptical stress distribution between the pressed surfaces. Factors like the curvature of the surfaces and angle of contact are considered. Charts are also included showing stress distribution parameters for different angles of contact.
This document provides an introduction and overview to using ANSYS Mechanical within the ANSYS Workbench environment. It outlines the objectives and agenda for a two-day training course covering topics such as importing geometry, meshing, applying loads and boundary conditions, and post-processing results. It also provides information on the ANSYS Workbench interface, including the toolbox, project schematic, and file management.
Introduction to Ansys Simulation- Global leaderAnanth Narayan
This document provides an overview of ANSYS, an engineering simulation software. It discusses that ANSYS was founded in 1970 and went public in 1996. It is used to design and test products using simulations of factors like durability, temperature, fluid flow, and electromagnetic properties. The document describes the two main ANSYS environments - APDL for analyzing structures and Workbench for finite element analysis across various systems. It provides examples of companies that use ANSYS and discusses how Nebia used ANSYS simulations to optimize its showerhead design.
1. The document discusses meshing and grid generation for computational fluid dynamics simulations. It describes the different types of grids, elements, and factors to consider for grid quality such as skewness, smoothness, and aspect ratio.
2. The key steps of the mesh generation process are outlined, including creating the geometry, generating boundary and volume meshes, and refining the mesh.
3. Guidelines for grid design are provided regarding resolving pertinent flow features, cell aspect ratios, and making the change in cell size gradual.
- A normal modes analysis was performed on a finite element model of a clamping set to determine its vibration mode shapes. The model was imported into HyperMesh and material properties and constraints were applied.
- An eigenvalue extraction was specified to calculate the first 6 modes. The results were viewed in HyperView and showed the component deforming in different patterns for each mode.
The document discusses the design of a rigid flange coupling to transmit 250 N-m of torque between two coaxial shafts. It first sizes the shaft diameter as 25 mm. It then designs each component:
1) The hub is designed as a hollow shaft with outer diameter of 50 mm and length of 37.5 mm. Shear stress in the hub is calculated to be 10.86 MPa.
2) The key is sized at 10 mm wide, 8 mm thick, and 37.5 mm long. Shear and crushing stresses are calculated to be 53.3 MPa and 133.3 MPa respectively.
3) The flange is 12.5 mm thick with a shear
This document provides a summary of key concepts in strength of materials for mechanical engineers. It defines terms like stress, strain, Hooke's law, moment of force, couple, center of gravity, moment of inertia, shear stress, Poisson's ratio, bulk modulus, principal plane and stress, Mohr's circle, resilience, malleability and ductility. It also discusses different types of beams, loading, shear force, bending moment, riveted joints, pitch and margin. The document aims to give a quick brush up on important topics in strength of materials through concise definitions and explanations of key terms and concepts.
1) The document discusses stresses in thin and thick cylinders, including circumferential (hoop), longitudinal, and radial stresses. It also covers principal stresses.
2) Formulas are provided for calculating wall thickness based on tangential stress in thin cylinders, and Lame's equation is introduced for thick cylinders.
3) Additional concepts covered include stresses in spherical vessels, pre-stressing techniques like autofrettage to increase pressure capacity, and stresses in cylinders under external pressure or combined internal and shrink pressures.
General steps of finite element analysisSasi Kumar
The document outlines the 10 general steps of the finite element method (FEM) for analyzing structures: 1) Discretize the structure into elements and nodes, 2) Number the nodes and elements, 3) Select displacement functions, 4) Define material behavior, 5) Derive the element stiffness matrix, 6) Assemble the global stiffness matrix, 7) Apply boundary conditions to remove singularities, 8) Solve the equations for unknown displacements, 9) Compute element strains and stresses, and 10) Interpret the results. The 10 steps provide the overall process for using FEM to model a structure and calculate its response to loading.
Ae6602 vibrations & elments of aeroelasticity 2 marksshanmuganathanm3
This document contains a question bank on vibrations and elements of aeroelasticity. It includes 22 multiple choice questions covering topics like definitions of vibration, classification of vibrations, causes and effects of vibration, free and forced vibration, damping, natural frequency, resonance, harmonic motion, and single degree of freedom systems. It also provides the answers to 2 mark questions on vibration of bars, simple harmonic motion, pendulums, and natural frequency. The question bank is intended for a course on vibrations and aeroelasticity.
The document discusses buckling and its theories. It defines buckling as the failure of a slender structural member subjected to compressive loads. It provides examples of structures that can experience buckling. It explains Euler's theory of buckling which derived an equation for the critical buckling load of a long column based on its bending stress. The assumptions of Euler's theory are listed. Four cases of long column buckling based on end conditions are examined: both ends pinned, both ends fixed, one end fixed and one end pinned, one end fixed and one end free. Effective lengths are defined for each case and the corresponding critical buckling loads given. Limitations of Euler's theory are noted. Rankine's empirical formula for calculating ultimate
This document contains information about stresses and Mohr's circle analysis:
1. It defines principal stresses and planes, and describes the uses of Mohr's circle in finding normal, resultant, and principal stresses and their planes.
2. Several example problems are presented involving calculating stresses on planes at various angles, determining principal stresses and maximum shear stresses, and drawing and using Mohr's circles to analyze two-dimensional stress systems.
3. Information is also provided about thin cylindrical shells, including the stresses induced in thin-walled cylinders under internal pressure and the assumptions made in their analysis.
The document provides examples of nonlinear concrete analysis using ANSYS, including:
1. Modeling rebar arrangement in SOLID65 elements and applying MISO material model for single compression.
2. Applying MISO material model under constrained compression by applying displacement increments and saving intermediate load steps.
3. Applying KINH material model to model concrete creep under sustained loading over time.
This document discusses the problem of thermal undershoot in transient thermal analysis and provides a solution. It shows a slab with uniform heat flux on one face and convection on the other, with the transient analysis resulting in temperatures falling below ambient. It then provides a relationship between element size and time step to avoid undershoot, and applies this to the model by increasing the number of elements from 30 to 10, resolving the undershoot issue.
The document discusses stress concentration and fatigue failure in machine elements. It defines stress concentration as irregular stress distribution caused by abrupt changes in cross-section shape. Stress concentration factors are introduced to quantify the maximum stress compared to nominal stress. The document also discusses endurance limit and fatigue strength testing methods. Factors that affect fatigue strength like material properties, surface finish, size and temperature are summarized. Methods to evaluate and reduce stress concentration in designs are provided.
Analysis of buckling behaviour of functionally graded platesByju Vijayan
1. The document discusses the buckling behavior of functionally graded plates through two case studies.
2. The first case study analyzes the buckling of simply supported functionally graded rectangular plates under non-uniform in-plane compressive loading using classical plate theory. It finds that the critical buckling coefficient increases with the power law index and aspect ratio.
3. The second case study examines the buckling of imperfect functionally graded plates under in-plane compressive loading. It determines that the critical buckling load depends on factors like the load ratio, power law index, and amplitude of imperfection.
This document summarizes different types of surfaces that are important from a CAD/CAM perspective. It discusses analytic surfaces like planes, ruled surfaces, tabulated surfaces, and surfaces of revolution which are defined by equations. It also discusses synthetic surfaces like Hermite bi-cubic surfaces, Bezier surfaces, B-spline surfaces, Coons surfaces, fillet surfaces, and offset surfaces which are defined by a set of data points and approximated with polynomials. The document provides examples and definitions of each surface type.
Finite Element analysis -Plate ,shell skew plate S.DHARANI KUMAR
This document provides an overview of plate and shell theory and finite element analysis for plates and shells. It discusses the assumptions and applications of thin plate theory, thick plate theory, and shell theory. It also describes different types of finite elements that can be used to model plates and shells, including plate, shell, solid shell, curved shell, and degenerated shell elements. Additionally, it covers skew plates and different discretization methods that can be used for finite element analysis of skew plates.
*Discretization of a Structure, 1D, 2D and 3D element Meshing, * Element selection criteria, *Refining Mesh,
*Effect of mesh density in critical region,
*Use of Symmetry.
*Element Quality Criterion:-Jacobian, Aspect ratio, Warpage, Minimum and Maximum angles, Average element size, Minimum Length, skewness, Tetra Collapse etc., *Higher Order Element vs Mesh Refinement,
*Geometry Associate Mesh, *Mesh quality,
*Bolted and welded joints representation,
*Mesh independent test.
- The document provides instructions for using CATIA's Sheet Metal Design workbench to design sheet metal parts.
- It begins with an overview and getting started tutorial, then covers topics like defining sheet metal parameters, creating walls and cutouts, generating bends, unfolding the part, and extracting drawings.
- The document also provides information on recognizing shapes from existing solid parts, generating bends from walls, adding additional sheet metal features, and designing sheet metal parts within an assembly context.
The document discusses contact stresses that occur between two surfaces pressed together, such as between a locomotive wheel and rail. It provides examples where contact stresses are significant, like in bearings and gears. When surfaces are pressed together, high stresses develop just below the surface at the point of contact. These stresses can cause failures like cracking or pitting. The document presents equations to calculate the principal stresses that develop from an elliptical stress distribution between the pressed surfaces. Factors like the curvature of the surfaces and angle of contact are considered. Charts are also included showing stress distribution parameters for different angles of contact.
This document provides an introduction and overview to using ANSYS Mechanical within the ANSYS Workbench environment. It outlines the objectives and agenda for a two-day training course covering topics such as importing geometry, meshing, applying loads and boundary conditions, and post-processing results. It also provides information on the ANSYS Workbench interface, including the toolbox, project schematic, and file management.
Introduction to Ansys Simulation- Global leaderAnanth Narayan
This document provides an overview of ANSYS, an engineering simulation software. It discusses that ANSYS was founded in 1970 and went public in 1996. It is used to design and test products using simulations of factors like durability, temperature, fluid flow, and electromagnetic properties. The document describes the two main ANSYS environments - APDL for analyzing structures and Workbench for finite element analysis across various systems. It provides examples of companies that use ANSYS and discusses how Nebia used ANSYS simulations to optimize its showerhead design.
1. The document discusses meshing and grid generation for computational fluid dynamics simulations. It describes the different types of grids, elements, and factors to consider for grid quality such as skewness, smoothness, and aspect ratio.
2. The key steps of the mesh generation process are outlined, including creating the geometry, generating boundary and volume meshes, and refining the mesh.
3. Guidelines for grid design are provided regarding resolving pertinent flow features, cell aspect ratios, and making the change in cell size gradual.
- A normal modes analysis was performed on a finite element model of a clamping set to determine its vibration mode shapes. The model was imported into HyperMesh and material properties and constraints were applied.
- An eigenvalue extraction was specified to calculate the first 6 modes. The results were viewed in HyperView and showed the component deforming in different patterns for each mode.
The document discusses the design of a rigid flange coupling to transmit 250 N-m of torque between two coaxial shafts. It first sizes the shaft diameter as 25 mm. It then designs each component:
1) The hub is designed as a hollow shaft with outer diameter of 50 mm and length of 37.5 mm. Shear stress in the hub is calculated to be 10.86 MPa.
2) The key is sized at 10 mm wide, 8 mm thick, and 37.5 mm long. Shear and crushing stresses are calculated to be 53.3 MPa and 133.3 MPa respectively.
3) The flange is 12.5 mm thick with a shear
This document provides a summary of key concepts in strength of materials for mechanical engineers. It defines terms like stress, strain, Hooke's law, moment of force, couple, center of gravity, moment of inertia, shear stress, Poisson's ratio, bulk modulus, principal plane and stress, Mohr's circle, resilience, malleability and ductility. It also discusses different types of beams, loading, shear force, bending moment, riveted joints, pitch and margin. The document aims to give a quick brush up on important topics in strength of materials through concise definitions and explanations of key terms and concepts.
1) The document discusses stresses in thin and thick cylinders, including circumferential (hoop), longitudinal, and radial stresses. It also covers principal stresses.
2) Formulas are provided for calculating wall thickness based on tangential stress in thin cylinders, and Lame's equation is introduced for thick cylinders.
3) Additional concepts covered include stresses in spherical vessels, pre-stressing techniques like autofrettage to increase pressure capacity, and stresses in cylinders under external pressure or combined internal and shrink pressures.
General steps of finite element analysisSasi Kumar
The document outlines the 10 general steps of the finite element method (FEM) for analyzing structures: 1) Discretize the structure into elements and nodes, 2) Number the nodes and elements, 3) Select displacement functions, 4) Define material behavior, 5) Derive the element stiffness matrix, 6) Assemble the global stiffness matrix, 7) Apply boundary conditions to remove singularities, 8) Solve the equations for unknown displacements, 9) Compute element strains and stresses, and 10) Interpret the results. The 10 steps provide the overall process for using FEM to model a structure and calculate its response to loading.
Ae6602 vibrations & elments of aeroelasticity 2 marksshanmuganathanm3
This document contains a question bank on vibrations and elements of aeroelasticity. It includes 22 multiple choice questions covering topics like definitions of vibration, classification of vibrations, causes and effects of vibration, free and forced vibration, damping, natural frequency, resonance, harmonic motion, and single degree of freedom systems. It also provides the answers to 2 mark questions on vibration of bars, simple harmonic motion, pendulums, and natural frequency. The question bank is intended for a course on vibrations and aeroelasticity.
The document discusses buckling and its theories. It defines buckling as the failure of a slender structural member subjected to compressive loads. It provides examples of structures that can experience buckling. It explains Euler's theory of buckling which derived an equation for the critical buckling load of a long column based on its bending stress. The assumptions of Euler's theory are listed. Four cases of long column buckling based on end conditions are examined: both ends pinned, both ends fixed, one end fixed and one end pinned, one end fixed and one end free. Effective lengths are defined for each case and the corresponding critical buckling loads given. Limitations of Euler's theory are noted. Rankine's empirical formula for calculating ultimate
This document contains information about stresses and Mohr's circle analysis:
1. It defines principal stresses and planes, and describes the uses of Mohr's circle in finding normal, resultant, and principal stresses and their planes.
2. Several example problems are presented involving calculating stresses on planes at various angles, determining principal stresses and maximum shear stresses, and drawing and using Mohr's circles to analyze two-dimensional stress systems.
3. Information is also provided about thin cylindrical shells, including the stresses induced in thin-walled cylinders under internal pressure and the assumptions made in their analysis.
The document provides examples of nonlinear concrete analysis using ANSYS, including:
1. Modeling rebar arrangement in SOLID65 elements and applying MISO material model for single compression.
2. Applying MISO material model under constrained compression by applying displacement increments and saving intermediate load steps.
3. Applying KINH material model to model concrete creep under sustained loading over time.
This document discusses the problem of thermal undershoot in transient thermal analysis and provides a solution. It shows a slab with uniform heat flux on one face and convection on the other, with the transient analysis resulting in temperatures falling below ambient. It then provides a relationship between element size and time step to avoid undershoot, and applies this to the model by increasing the number of elements from 30 to 10, resolving the undershoot issue.
Project for Design of a Signboard ColumnMANISH JANGIR
Our project report investigates the characteristics or more specifically design of a column on which a signboard is to be installed at the gate of IIT ROORKEE. It is a detailed design report for the column with preliminary calculations, materials selection, solid geometry, stress analysis and cost estimation. In order to design the column we have considered drag force of air on the signboard, weight of the signboard and different materials for making the most optimum design of the column such that it supports the weight of the signboard and the drag force on the signboard due to air. Length of the column (5m), dimensions of the signboard (4m*2m*0.05m) and dead load of the assembly (50kg) is given. For designing the column we have used the data given to calculate the forces on the column. Also, we have used software tools like SOLIDWORKS 2014 EDITION for designing the pole and ANSYS 2015 EDITION for the analysis of the column after application of the calculated forces. Finally we have summarized the conclusions of analysis by using ANSYS which includes the material to be used and the design specifications of the pole.
This document describes a finite element analysis simulation of a riveting process in ANSYS and compares the results to experimental data. The simulation modeled a rivet being driven into a sheet metal joint. Material properties, boundary conditions, and a displacement-controlled loading process were defined. The results for bulge diameter and protruding rivet height matched well with experimental testing, with less than 2.13% difference. This validated the ability of the ANSYS simulation to accurately model the riveting process.
Buckling Restrained Braces (BRBs) were developed in Japan in the 1980s to allow cyclic lateral loads and earthquake-induced loads on buildings. BRBs consist of a steel core encased in a concrete or mortar casing with a debonding agent between them. This prevents buckling of the core while allowing movement. BRBs provide high stiffness and ductility, yielding in both tension and compression. They are commonly used in seismic retrofitting and as an alternative to Concentrically Braced Frames due to their economical and seismic performance. BRBs are tested at both the component and sub-assembly level to validate their behavior under cyclic loading.
Apic 2016 nj final for website 21 05-2016Noor Jivraj
This document discusses high performance thermoplastics (HPTPs) and their increasing use in niche applications. It presents information on HPTP properties, performance requirements in different industries, key HPTP families and players. Specific HPTPs like PEEK and PPS are examined in more detail regarding their demand drivers, properties, and growth. The document concludes that innovation in materials has driven demand for HPTPs in industries like aerospace, medical, and electronics, and that major players have invested in developing broad HPTP portfolios and capacities.
This document outlines Arash Nasr's finite element analysis capabilities and experience. It details his proficiency with various FE techniques including dynamic, plasticity, composite, fracture mechanics, damage, geotechnical, buckling, fatigue and thermal analyses. It lists the software he is experienced with, such as Abaqus, Ansys, and Altair. It also provides examples of projects he has worked on applying these techniques to problems in fields like pipelines, offshore structures, ships and concrete. Finally, it outlines his roles supporting FEA and recent training courses to remain updated on the latest techniques.
This presentation is given at Santa Clara Ansys Conference in 2014, where we have presented the viscoelastic modelling capabilities in Ansys and the basic requirements for such modelling. The presentation is simple and a good starting point to understand viscoelastic modeling in Ansys.
This document provides a summary of Chapter 1 from an MSc lecture note on the stability of structures. It discusses the behavior, analysis, and design of steel frames. It covers key topics like limit state design concepts, load factors, types of loads (dead, live, wind, earthquake), and linear analysis methods commonly used in structural engineering practice and design codes. The chapter introduces fundamental concepts important for understanding the analysis and design of structures for safety and serviceability.
The document discusses using the differential quadrature method to analyze buckling in thin plates. It provides an overview of buckling and introduces the differential quadrature method as an efficient numerical technique. The method transforms differential equations into algebraic equations using sampling points. The document applies the method to analyze buckling in isotropic rectangular plates with different boundary conditions and aspect ratios. Results show the differential quadrature method provides accurate results using fewer grid points compared to other methods like finite element analysis.
This document summarizes research on the buckling failure of compressed cellular steel members. Cellular members have large circular openings in their web which makes them more efficient in material use than plain members, but also alters their failure behavior when loaded axially and in bending. Through finite element analysis of various geometries, the authors developed a design approach to calculate the ultimate failure load based on the member's weak-axis flexural buckling capacity. Preliminary results found the approach provides acceptable but conservative estimates of failure load compared to simulations. Further study of residual stresses is still needed to fully validate the design approach.
Application of ANSYS in Design of a Connecting RodAbhishek Gorai
The document discusses the design and analysis of a connecting rod using ANSYS. It describes ANSYS as a leading engineering simulation software. It then outlines the steps taken to model, mesh, apply loads to, and analyze a connecting rod design based on specifications for a Honda motorcycle engine. These steps include assigning material properties, creating a CAD model, generating a mesh, applying the expected buckling load, and evaluating stresses, deformation, buckling, and fatigue life. The analysis found an equivalent stress of 252.2 MPa, a safety factor of 2.44 for fatigue, and a buckling load multiplier of 5.598.
This Haiku Deck presentation contains photos from various sources including NASA's Marshall Space Flight Center, Defence Images, and individuals like sobolevnrm and woodleywonderworks. The presentation encourages the viewer to be inspired by the images and create their own Haiku Deck presentation on SlideShare.
This document discusses different types of plastics used in construction, their properties, and applications. It outlines several families of plastics like acrylic, composites, expanded polystyrene, polycarbonate, polyethylene, polypropylene, and polyvinyl chloride. Plastics are described as strong, lightweight materials that are durable, weather resistant, and don't corrode. The document also examines various polymers used in construction and their applications, including flooring, windows, pipes, seals, and insulation. It provides examples of specific plastics like epoxy, polyethylene, polycarbonate, and their construction uses.
ANSYS/LS-DYNA is a general purpose explicit dynamics finite element program that allows for highly nonlinear transient dynamic simulations. It provides a seamless interface between ANSYS for pre- and post-processing and the LS-DYNA solver. Key benefits include support for advanced material models, large deformations, and a variety of contact types through the robust LS-DYNA solver. Common applications include crashworthiness analysis, manufacturing process simulations, and impact/contact simulations.
Buckling and tension field beam for aerospace structuresMahdi Damghani
This document provides an introduction to column buckling, including:
- Buckling occurs due to high compressive stresses that cause sudden sideways deflection.
- Boundary conditions affect the critical buckling load, with fixed-fixed columns having the highest load.
- Euler's equation is presented for calculating critical buckling loads of columns with various end conditions.
- Examples are provided to demonstrate calculating critical buckling loads and required cross-sectional sizes.
- Buckling of spar webs in aircraft is discussed, along with the concept of complete tension field action to resist buckling through diagonal tensile stresses.
- Equations are given for calculating stresses in spars designed using complete tension field action.
The document discusses developing user-defined material models in LS-DYNA. It covers learning LS-DYNA and FORTRAN, implementing a material subroutine, compiling it with LS-DYNA, and verifying the material model. Key steps include writing theoretical equations for the material model, coding the subroutine, inserting it into the LS-DYNA source code file dyn21.f, compiling a new LS-DYNA executable, and running simple simulations to validate the material model outputs.
This document discusses buckling of columns. It begins by introducing the concept of buckling as a failure mode distinct from stresses exceeding strength or unacceptable deformations. It then uses an example of two rigid bars joined by a pin to model the mechanics of buckling, defining the critical load as the transition between stable and unstable equilibrium. Finally, it derives equations for the critical buckling load of columns based on their end conditions, noting pinned ends buckle at the lowest load.
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1. UofA ANSYS Tutorial
ANSYS
UTILITIES
BASIC
TUTORI
ALS
INTERMEDI
ATE
TUTORIALS
ADVAN
CED
TUTORI
ALS
POSTPR
OC.
TUTORI
ALS
COMMAND
LINE FILES
PRINTA
BLE
VERSIO
N
Effect of Self Weight
Distributed Loading
NonLinear Analysis
Solution Tracking
Buckling
NonLinear Materials
Dynamic - Modal
Dynamic - Harmonic
Dynamic - Transient
Thermal-Conduction
Buckling
Introduction
This tutorial was created using ANSYS 7.0 to solve a simple buckling problem.
It is recommended that you complete the NonLinear Tutorial prior to beginning
this tutorial
Buckling loads are critical loads where certain types of structures become unstable.
Each load has an associated buckled mode shape; this is the shape that the structure
assumes in a buckled condition. There are two primary means to perform a
buckling analysis:
1. Eigenvalue
Eigenvalue buckling analysis predicts the theoretical buckling strength of
an ideal elastic structure. It computes the structural eigenvalues for the
given system loading and constraints. This is known as classical Euler
buckling analysis. Buckling loads for several configurations are readily
available from tabulated solutions. However, in real-life, structural
imperfections and nonlinearities prevent most real-world structures from
reaching their eigenvalue predicted buckling strength; ie. it over-predicts
the expected buckling loads. This method is not recommended for accurate,
real-world buckling prediction analysis.
2. Nonlinear
Nonlinear buckling analysis is more accurate than eigenvalue analysis
because it employs non-linear, large-deflection, static analysis to predict
buckling loads. Its mode of operation is very simple: it gradually increases
the applied load until a load level is found whereby the structure becomes
unstable (ie. suddenly a very small increase in the load will cause very large
deflections). The true non-linear nature of this analysis thus permits the
modeling of geometric imperfections, load perterbations, material
nonlinearities and gaps. For this type of analysis, note that small off-axis
2. Thermal-Mixed Bndry
Transient Heat
Axisymmetric
Index
Contributions
Comments
MecE 563
Mechanical Engineering
University of Alberta
ANSYS Inc.
loads are necessary to initiate the desired buckling mode.
This tutorial will use a steel beam with a 10 mm X 10 mm cross section, rigidly
constrained at the bottom. The required load to cause buckling, applied at the top-
center of the beam, will be calculated.
Eigenvalue Buckling Analysis
Preprocessing: Defining the Problem
1. Open preprocessor menu
/PREP7
2. Give example a Title
Utility Menu > File > Change Title ...
/title,Eigen-Value Buckling Analysis
3. Define Keypoints
4. In the window that appears, enter the following geometric properties
for steel:
i. Young's modulus EX: 200000
ii. Poisson's Ratio PRXY: 0.3
8. Define Mesh Size
Preprocessor > Meshing > Size Cntrls > ManualSize > Lines > All
Lines...
For this example we will specify an element edge length of 10 mm
(10 element divisions along the line).
9. Mesh the frame
Preprocessor > Meshing > Mesh > Lines > click 'Pick All'
LMESH,ALL
Solution Phase: Assigning Loads and Solving
1. Define Analysis Type
Solution > Analysis Type > New Analysis > Static
ANTYPE,0
2. Activate prestress effects
To perform an eigenvalue buckling analysis, prestress effects must be
activated.
o You must first ensure that you are looking at the unabridged
solution menu so that you can select Analysis Options in the
Analysis Type submenu. The last option in the solution menu will
either be 'Unabridged menu' (which means you are currently
looking at the abridged version) or 'Abriged Menu' (which means
you are looking at the unabridged menu). If you are looking at the
abridged menu, select the unabridged version.
o Select Solution > Analysis Type > Analysis Options
o In the following window, change the [SSTIF][PSTRES] item to
'Prestress ON', which ensures the stress stiffness matrix is
calculated. This is required in eigenvalue buckling analysis.
5. 3. Apply Constraints
Solution > Define Loads > Apply > Structural > Displacement > On
Keypoints
Fix Keypoint 1 (ie all DOF constrained).
4. Apply Loads
Solution > Define Loads > Apply > Structural > Force/Moment >
On Keypoints
The eignenvalue solver uses a unit force to determine the necessary
buckling load. Applying a load other than 1 will scale the answer by
a factor of the load.
Apply a vertical (FY) point load of -1 N to the top of the beam
6. (keypoint 2).
The applied loads and constraints should now appear as shown in the figure
below.
5. Solve the System
Solution > Solve > Current LS
SOLVE
6. Exit the Solution processor
Close the solution menu and click FINISH at the bottom of the
Main Menu.
FINISH
Normally at this point you enter the postprocessing phase. However, with a
buckling analysis you must re-enter the solution phase and specify the
buckling analysis. Be sure to close the solution menu and re-enter it or the
buckling analysis may not function properly.
7. Define Analysis Type
Solution > Analysis Type > New Analysis > Eigen Buckling
ANTYPE,1
8. Specify Buckling Analysis Options
o Select Solution > Analysis Type > Analysis Options
o Complete the window which appears, as shown below. Select
7. 'Block Lanczos' as an extraction method and extract 1 mode. The
'Block Lanczos' method is used for large symmetric eigenvalue
problems and uses the sparse matrix solver. The 'Subspace' method
could also be used, however it tends to converge slower as it is a
more robust solver. In more complex analyses the Block Lanczos
method may not be adequate and the Subspace method would have
to be used.
9. Solve the System
Solution > Solve > Current LS
SOLVE
10. Exit the Solution processor
Close the solution menu and click FINISH at the bottom of the
Main Menu.
FINISH
Again it is necessary to exit and re-enter the solution phase. This time,
however, is for an expansion pass. An expansion pass is necessary if you
want to review the buckled mode shape(s).
11. Expand the solution
o Select Solution > Analysis Type > Expansion Pass... and ensure
that it is on. You may have to select the 'Unabridged Menu' again to
make this option visible.
o Select Solution > Load Step Opts > ExpansionPass > Single
Expand > Expand Modes ...
8. o Complete the following window as shown to expand the first mode
12. Solve the System
Solution > Solve > Current LS
SOLVE
Postprocessing: Viewing the Results
1. View the Buckling Load
To display the minimum load required to buckle the beam select
General Postproc > List Results > Detailed Summary. The value
listed under 'TIME/FREQ' is the load (41,123), which is in Newtons
for this example. If more than one mode was selected in the steps
above, the corresponding loads would be listed here as well.
/POST1
SET,LIST
2. Display the Mode Shape
o Select General Postproc > Read Results > Last Set to bring up
the data for the last mode calculated.
o Select General Postproc > Plot Results > Deformed Shape
9. Non-Linear Buckling Analysis
Ensure that you have completed the NonLinear Tutorial prior to beginning this
portion of the tutorial
Preprocessing: Defining the Problem
1. Open preprocessor menu
/PREP7
2. Give example a Title
Utility Menu > File > Change Title ...
/TITLE, Nonlinear Buckling Analysis
3. Create Keypoints
Preprocessor > Modeling > Create > Keypoints > In Active CS
K,#,X,Y
We are going to define 2 keypoints (the beam vertices) for this
structure to create a beam with a length of 100 millimeters:
10. Keypoint Coordinates (x,y)
1 (0,0)
2 (0,100)
4. Define Lines
Preprocessor > Modeling > Create > Lines > Lines > Straight Line
Create a line between Keypoint 1 and Keypoint 2.
L,1,2
5. Define Element Types
Preprocessor > Element Type > Add/Edit/Delete...
For this problem we will use the BEAM3 (Beam 2D elastic)
element. This element has 3 degrees of freedom (translation along
the X and Y axis's, and rotation about the Z axis). With only 3
degrees of freedom, the BEAM3 element can only be used in 2D
analysis.
6. Define Real Constants
Preprocessor > Real Constants... > Add...
In the 'Real Constants for BEAM3' window, enter the following
geometric properties:
i. Cross-sectional area AREA: 100
ii. Area Moment of Inertia IZZ: 833.333
iii. Total beam height HEIGHT: 10
This defines an element with a solid rectangular cross section 10 x
10 millimeters.
7. Define Element Material Properties
Preprocessor > Material Props > Material Models > Structural >
Linear > Elastic > Isotropic
In the window that appears, enter the following geometric properties
for steel:
i. Young's modulus EX: 200e3
11. ii. Poisson's Ratio PRXY: 0.3
8. Define Mesh Size
Preprocessor > Meshing > Size Cntrls > Lines > All Lines...
For this example we will specify an element edge length of 1 mm
(100 element divisions along the line).
ESIZE,1
9. Mesh the frame
Preprocessor > Meshing > Mesh > Lines > click 'Pick All'
LMESH,ALL
Solution: Assigning Loads and Solving
1. Define Analysis Type
Solution > New Analysis > Static
ANTYPE,0
2. Set Solution Controls
o Select Solution > Analysis Type > Sol'n Control...
The following image will appear:
Ensure the following selections are made under the 'Basic' tab (as
12. shown above)
A. Ensure Large Static Displacements are permitted (this will
include the effects of large deflection in the results)
B. Ensure Automatic time stepping is on. Automatic time
stepping allows ANSYS to determine appropriate sizes to
break the load steps into. Decreasing the step size usually
ensures better accuracy, however, this takes time. The
Automatic Time Step feature will determine an appropriate
balance. This feature also activates the ANSYS bisection
feature which will allow recovery if convergence fails.
C. Enter 20 as the number of substeps. This will set the initial
substep to 1/20 th
of the total load.
D. Enter a maximum number of substeps of 1000. This stops
the program if the solution does not converge after 1000
steps.
E. Enter a minimum number of substeps of 1.
F. Ensure all solution items are writen to a results file.
Ensure the following selection is made under the 'Nonlinear' tab (as
shown below)
G. Ensure Line Search is 'On'. This option is used to help the
Newton-Raphson solver converge.
H. Ensure Maximum Number of Iterations is set to 1000
13. NOTE
There are several options which have not been changed from their
default values. For more information about these commands, type
help followed by the command into the command line.
3. Apply Constraints
Solution > Define Loads > Apply > Structural > Displacement > On
Keypoints
Fix Keypoint 1 (ie all DOFs constrained).
4. Apply Loads
Solution > Define Loads > Apply > Structural > Force/Moment >
On Keypoints
Place a -50,000 N load in the FY direction on the top of the beam
(Keypoint 2). Also apply a -250 N load in the FX direction on
Keypoint 2. This horizontal load will persuade the beam to buckle at
the minimum buckling load.
The model should now look like the window shown below.
14. 5. Solve the System
Solution > Solve > Current LS
SOLVE
The following will appear on your screen for NonLinear Analyses
15. This shows the convergence of the solution.
General Postprocessing: Viewing the Results
1. View the deformed shape
o To view the element in 2D rather than a line: Utility Menu >
PlotCtrls > Style > Size and Shape and turn 'Display of element'
ON (as shown below).
16. o General Postproc > Plot Results > Deformed Shape... > Def +
undeformed
PLDISP,1
17. o View the deflection contour plot
General Postproc > Plot Results > Contour Plot > Nodal
Solu... > DOF solution, UY
PLNSOL,U,Y,0,1
18. Other results can be obtained as shown in previous linear static analyses.
Time History Postprocessing: Viewing the Results
As shown, you can obtain the results (such as deflection, stress and bending
moment diagrams) the same way you did in previous examples using the General
Postprocessor. However, you may wish to view time history results such as the
deflection of the object over time.
1. Define Variables
o Select: Main Menu > TimeHist Postpro. The following window
should open automatically.
19. If it does not open automatically, select Main Menu > TimeHist
Postpro > Variable Viewer
o Click the add button in the upper left corner of the window to
add a variable.
o Double-click Nodal Solution > DOF Solution > Y-Component of
displacement (as shown below) and click OK. Pick the uppermost
node on the beam and click OK in the 'Node for Data' window.
20. o To add another variable, click the add button again. This time select
Reaction Forces > Structural Forces > Y-Component of Force.
Pick the lowermost node on the beam and click OK.
o On the Time History Variable window, click the circle in the 'X-
Axis' column for FY_3. This will make the reaction force the x-
variable. The Time History Variables window should now look like
this:
2. Graph Results over Time
o Click on UY_2 in the Time History Variables window.
o Click the graphing button in the Time History Variables
window.
o The labels on the plot are not updated by ANSYS, so you must
change them manually. Select Utility Menu > Plot Ctrls > Style >
Graphs > Modify Axes and re-label the X and Y-axis
appropriately.
21. The plot shows how the beam became unstable and buckled with a
load of approximately 40,000 N, the point where a large deflection
occured due to a small increase in force. This is slightly less than
the eigen-value solution of 41,123 N, which was expected due to
non-linear geometry issues discussed above.
Command File Mode of Solution
The above example was solved using a mixture of the Graphical User Interface (or
GUI) and the command language interface of ANSYS. This problem has also been
solved using the ANSYS command language interface that you may want to
browse. Open the .HTML version, copy and paste the code into Notepad or a
similar text editor and save it to your computer. Now go to 'File > Read input
from...' and select the file. A .PDF version is also available for printing.